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The Goodman 10690402S is the OEM blower-compartment door interlock switch for the Amana/Goodman AMEC960603ANAA gas furnace. This safety switch de-energizes the furnace control board and blower whenever the blower access panel is removed, protecting technicians and homeowners from live 120V terminals and a spinning blower wheel. A furnace that won't start after service is very often traced to this switch not being depressed by a properly seated door.
OEM vs. Generic: The genuine OEM 10690402S matches the original plunger height and mounting footprint exactly, so the panel actuates it reliably. Generic pushbutton switches frequently sit at the wrong depth, leading to intermittent no-heat calls that are hard to diagnose.
Install difficulty: Easy (2/5). Unplug the two spade connectors, remove the mounting screws, and swap. Shut off power at the breaker first and confirm the new switch actuates fully when the door is reinstalled.